Safety appliance for elevators.



B. DIDIER. SAFETY APPLIANCE FOR ELEVATORS.

APPLICATION FILED JAN. 29. 1913.

Patented Sept. 9, 1913.

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E. DIDIER.

SAFETY APPLIANCE FOR ELEVATORS.

APPLIOATION FILED JAN. 29, 1913.

1,072,835. Patented Sept. 9, 1913.

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E. DIDIBR. SAFETY APPLIANCE FOR ELEVATORS.

APPLICATION FILED JAN. 29. 1913.

Patented Sept. 9, 1913.

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EDMUND DIDIER, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE UNIVERSAL SAFETY ELEVATOR LOCKING DEVICE 00., A CORPORATION OF MARYLAND.

SAFETY APPLIANCE FOB ELEVATORS.

Specification of Letters Patent.

Patented Sept. 9, 1913.

Application filed. January 29, 1913. Serial N 0. 744,803.

To all whom it may concern:

Be it known that I, EDMUND DIDIER, of the city of Baltimore and State of Maryland, have invented certain Improvements in Safety Appliances for Elevators, of which the following is a specification.

This invention relates to certain improvements in the safety appliance for elevators, described and claimed in Letters Patent No. 936,285, granted to Joseph Taylor Albert on the 12th day of October, 1909, as will hereinafter fully appear.

In the description of the said invention which follows, reference is made to the accompanying drawings, forming apart hereof, and in which p Figure l is a sectional rear view of the elevator cage when the same is so situated as to give access thereto from a floor of the building, and the safety mechanism which to gether with the cage,forms the subject of the present invention. The said figure also shows certain parts of a corresponding mechanism situated at the floor next below, together with a part of thecage. Fig. 2 is a section taken on the broken line wm in Fig. 1, looking in the direction indicated by the arrow in that figure. Fig. 3 is a top or plan View of certain parts of Fig. 1. Figs. 4, 5 and 6 are views of certain parts of the safety appliance on an enlarged scale.

Referring now to the drawings, 1 repre sents a floor of a building, and 2 the bottom of the elevator cage which is shown as on horizontal alinement with the floor. 3, 3 are the sides of the cage, and 4 its roof.

5 is the sliding door which gives access to the cage, provided with brackets 7 carrying roller-s9 which run on the fixedtrack rail 1O.

11 is the shaft of the controller having the hand lever 12 whereby the cage is put in motion or stopped, and 16 a link which connects the hand lever with an arm 13 on a shaft 17, which shaft has also an arm 18, pivoted to the vertical connecting rod 14;.

15 is a rocking shaft supported in bearings on the roof 4 .of the cage, and19 a bell crank on the said shaft to the horizontal arm of which the connecting rod 14 is pivte 20 is a tripper which is mounted upon a pair of horizontal parallel bars 21 adapted to slide in a branched bearing 22 secured to the outside of the roof & of the cage. The ends of the tripper are curved inward as best shown in Fig. 2, and its outer and operating face is rounded. To the inner side of the tripper 20 is pivoted a horizontal link 2a which connects the tripper with the vertical arm of the bell-crank 19.

25 is a horizontally extending plate hinged at one end to a side wall of the elevator shaft, so as to be susceptible to a vibratory movement toward and from the cage. Near to its free end, the plate 25 is inclined inward as shown in Figs. 3 to 6 inclusive, and from the inclined part which is represented by 26, to its free end, it is straight and parallel with the other portion of the plate beyond the incline. The object of this peculiar construction of the vibratory plate 25 will be hereinafter described.

27 is a Stud projecting from the end of a hanger 29 which is secured to some fixed or stationary object in the elevator shaft, to support the free end of the horizontal hinged plate 25, without interfering with its vibratory motion.

30 is a bracket embodying two spaced horizontal projections 31, which is fastened by means of rivets to the inner side of the hinged plate 25, and between the said projections, and pivoted thereto, is an angular spring-held tumbler which is best shown on an enlarged scale in Figs. 4, 5 and 6, having at its end which is situated between the said projections, a knuckle 33 and the said projections are provided with vertical slots 34 in alinement one with the other as shown in the same figures. These slots admit of the entrance into the bracket of the tripper 20, and of its engagement with the knuckle 33 of the spring-held tumbler, as shown in Fig. 6, in circumstances hereinafter described, The other end of the tumbler or that part thereof which is exterior of the bracket 30, is adapted to pass through a slot 36 in the inclined part '26 of the horizontal hinged vibratory plate 25 and be thereby brought into thepath of a bar 37 which extends upward from the top of the sliding door 5 as pass through the slot 36 in the inclined portion 26 of the hinged vibratory plate 25 and into the path of the bar 37, as before stated, is provided with a notched surface. lhe ob ject of this construction is to prevent the opening of the door 5 when the said tumbler is slightly moved by the tripper 20, or into the position shown in Fig. 5. there be a plain inclined instead of a notched surface, a sudden movement of the door to effect its opening, when the tumbler is in the position shown in- Fig. 5 might possibly cause the tumbler to pass to approximately the position shown in Fig. 6 and the door be released. Such a contingency is not likely to occur, but it is possible. The notched surface of the tumbler 32 effects a positive engagement of the same with the bar 37 until the tripper is fully within the slots 34: in the bracket 30, as shown in Fig. 6.

It will be understood that when the cage is stopped, the hand lever 12 is in a central or vertical position as shown in Figs. 1 and 2, and the tripper 20 directly opposite the vertical slots 34 in the bracket 80 and the knuckle 38 of the spring-held tumbler 82, as shown in Fig. 5; and in an effort to open .the sliding door 5, the bar 37 which has a movement in common with the door, slides along the inclined portion 26 of the hinged plate 25, and forces the plate inward which causes the knuckle of the spring-held tumbler to strike the tripper, and be forced back, and its free end detached from the bar 37 and that device which as before stated moves with the door, slides along the said plate as an inoperative device until the door is again closed, when it recrosses the inclined part 26 of the vibratory plate 25 and reengages the end of the tumbler.

It will be seen that while the sliding door is open, the cage cannot be moved either up or down, as the hand lever 12 of the controller is locked in its central or inoperative position, by the tripper 20 being within the slots 34 in the bracket 30; but upon the closing of the door which has the effect of replacing the vibratory plate 25 in its original or outward position, by the repassage of the bar 37 across the inclined part 26 of the plate, and the removal of the tripper from the tumbler as shown in Fig. 4, the hand lever of the controller becomes operative to start the cage in either an upward or downward direction, and at the same time the sliding door is locked and cannot be opened until the cage is stopped at a floor either above or below the one from which it has moved.

From the foregoing description of the invention, it will be understood, no sliding Should is again closed, and in nocase can access be had to the elevator shaft.

I claim as my invention 1. An elevator shaft having a sliding door is adapted to slide as the door is opened, and

an interfering spring-held tumbler normally in the path of the locking bar, combined with a cage, a controller in the cage,

and a tripper which receives its motion from the controller, adapted to cooperate with the tumbler whereby when the cage comes to a stand, the sliding door can be opened, and at the same time the controller is locked and rendered inoperative until the sliding door is closed.

2. An elevator shaft having a sliding door provided with a projecting locking bar, a horizontally extending plate situated above the door, hinged at one end to the side wall of the elevator shaft, and having an inclined surface thereon. over which the locking bar is adapted to slide as the door is opened, and a spring-held tumbler, combined with a cage, a controller in the cage, and a tripper on the cage which receives its motion from the controller and is adapted to cooperate with the tumbler whereby when the cage comes to a stand, the sliding door canbe opened, and at the same time the controller is locked. l V V 3. An elevator shaft having a sliding door provided with a projecting locking bar,,a vibratory platewhich extends transversely of the shaft, situated in a position above the door and hinged at one end to the sidewall of the elevator shaft, the said plate having an inclined surface over which the said locking bar is adapted to slide and thereby move the plate in the opening of the door, and locking devices to engage the said bar and so prevent its movement longitudinally of the inclined surface of the plate, combined with a cage, a controller in the cage, and mechanism operated by the controller when the cage is brought to a stand to cooperate with the locking device to release the sliding door, and at the same time lock the controller until the sliding door is again closed.

4. An elevator shaft having a sliding door provided with a-projecting locking bar, and a vibratory plate situated transversely 'of the shaft and above the door, the said plate having an apertured surface which is in clined with respect to the plate, a slotted the bracket, combined With a cage containas the vibratory plate is moved toward the ing a controller, a tripper situated on the cage, and at the same time lock the conroof of the cage, having a sliding movement troller.

derived from the controller, adapted When EDMUND DIDIER. 5 the controller is in an inoperative position Witnesses:

to enter the slots in the bracket and co- JULIA B. ROBINSON,

operate With the tumbler to release the door -WM. T. HOWARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

